The best satellite speakers in the PC market, behind only the Klipsch RCX 2.1 and 5.1 systems, although they cost $400 and $900 respectively.
The second best subwoofer behind the Klipsch Ultra sub (a variant of the reference line RW-8 with regular poly drivers instead of aluminum).
Under $400, the best PC surround set you can get.
You can always build a sound system that is better, but it's like building your own computer. There may be more performance, but less mystique out of buying something out of a mystery box. (Like chefs not eating their own cooking, even if they are top level chefs).
PC systems are compact. Component systems are bigger, more parts to worry about, more switching, but better quality. Some people prefer to be hassle free, some people prefer speed, or sonic or video quality above asthetics.